CN110072460A - Visualization collimation mistake - Google Patents
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Abstract
The visual field of x-ray imaging system should be suitably set to ensure that interested anatomic information will not be omitted.Particularly, it is necessary to ensure that the operator of x-ray system does not allow patient to leave x-ray imaging system, until the correct anatomical structure of determination has obtained imaging.Visual field border mistake caused by application discusses a kind of make it possible to the error configurations because of x-ray imaging system carries out visual technology.Optionally, boundary error is displayed on the user display of system control position or visual field mistake is projected to the patient in x-ray system.Therefore, can with the operator of warning system, there are boundary errors so that being able to carry out new X-ray exposure if necessary.
Description
Technical field
Present invention relates in general to the user feedbacks in x-ray imaging system, more particularly relate to x-ray system
Display unit, the x-ray imaging system comprising the display unit, the boundary error in X-ray image data for identification side
Method, computer program element and computer-readable medium.
Background technique
It is a complicated task that the visual field (FOV) exposed for radiophotography, which is arranged, it needs trained radiation
Cinematographer focuses on.Generated mistake (for example, collimation mistake) may result in from radioscopic image when visual field is arranged
The extreme portion of organ is omitted in data, it is particularly true when wishing that these organs are included in X-ray data.Such case
It will need to re-shoot radioscopic image.In general, in such a case it is necessary to patient to be recalled to the hospital being imaged before,
So as to carry out another exposure.
Entitled " the The art of rejection:Comparative analysis between of Taylor, N
Computed Radiography and Digital Radiography workstations in the Accident and
Emergency and General radiology departments at a district general hospital
using customized and standardized reject criteria over a three-year period”
(Radiography's, 2014, Elsevier, http://dx.doi.org/10.1016/j.radi.2014.12.003)
Article discusses the bad problem of radiophotography exposure.
Summary of the invention
According in a first aspect, providing a kind of display unit for x-ray system.The display unit includes:
Data communication interface；
Handle unit；And
Display output unit comprising projecting cell.
The data communication interface is configured with x-ray imaging device to obtain first of the area-of-interest of object
Point the first X-ray image data, wherein first X-ray image data be using have be arranged to initial visual field shape
The x-ray imaging device of the adjustable viewing field of state obtains.
The processing unit is configured as: analysis first X-ray image data is in the first radioscopic image number
According to middle identification boundary error；It is defined based on the analysis to first X-ray image data and first X ray picture
As the adjacent boundary error region of data；And boundary error instruction is generated based on defined boundary error region.
The display output unit is configured as projecting to boundary error instruction by using the projecting cell
Come to show the boundary error instruction to user on the second part of the area-of-interest of the object.
Therefore, it can directly be illustrated to the user of x-ray imaging device and need other X-ray since picture quality is insufficient
The exposed fact.Holiday can be shown to user, in order to reset equipment.
According to example, a kind of display unit for x-ray system is provided.The display unit includes:
Data communication interface；
Handle unit；And
Display output unit.
The data communication interface is configured with x-ray imaging device to obtain first of the area-of-interest of object
Point the first X-ray image data, wherein first X-ray image data be using have be arranged to initial visual field shape
The x-ray imaging device of the adjustable viewing field of state obtains.
The processing unit is configured as: analysis first X-ray image data is in the first radioscopic image number
According to middle identification boundary error；It is defined based on the analysis to first X-ray image data and first X ray picture
As the adjacent boundary error region of data；And boundary error instruction is generated based on defined boundary error region.
The display output unit is configured as showing the boundary error instruction to user.
Optionally, the display output unit further include:
User interface display unit.The user interface display unit is additionally configured to show in the user interface single
The boundary error instruction is shown in member.
Thus, for example, boundary error region can be clearly illustrated to user on the screen of digital X-ray machine.
Optionally, the processing unit is additionally configured to indicate the boundary error and the first radioscopic image number
The first X-ray image data with annotation is formed according to being combined, and the display output unit is additionally configured to pass through
Show that the first X-ray image data of the band annotation to show the boundary to user on the user interface display unit
Error indication.
Therefore, the X-ray image data with annotation can be exported, so that not being physically located in the x-ray imaging
The user of the X-ray image data of at device, the described band annotation can identify boundary error.
Optionally, the display unit further include:
Projecting cell.
The display output unit is also configured to use the projecting cell and boundary error instruction is projected to institute
It states on the second part of the area-of-interest of object.
Therefore, boundary error region can be projected directly into the interested of patient in such a way that system user is difficult to ignore
On region.It reduce users in the possibility for taking corrective action (such as shooting new radioscopic image) to leave X-ray room before
Property.
Optionally, the processing unit is also configured to calculate the field conditions updated, and passes through (i) for update
On the Part III for the area-of-interest that visual field instruction projects to the object and/or (ii) is shown in the user interface
The visual field instruction of update is shown on unit to show the visual field instruction of the update.
Optionally, the projecting cell includes digital projection unit.The boundary error instruction is using digital projection list
Member is projected on the second part of the area-of-interest of the object.
Digital projection unit can provide the instruction with many boundary error regions of different shapes.
Optionally, the projecting cell further include:
Component of the light filter is operatively coupled to the processing unit and can be configured as at least partly exist
Light source, which is directed toward on the periphery of the optical path of the area-of-interest, to be extended.
The processing unit is also configured to configure the component of the light filter at least based on boundary error instruction
Partly extend on the periphery of the optical path for the light source being located inside x-ray source, and sends for irradiating the X-ray
The project signal of light source inside source.
Therefore, the existing illumination mechanism of many X-ray production apparatus may be adapted to highlight the periphery mistake in visual field setting.
Optionally, the visual field instruction of the boundary error instruction and/or the update is using one in the following terms
Or on the part of the multinomial area-of-interest for being displayed on the user interface and/or the object: the square of (i) coloring
Shape instruction, (ii) have lower or more highlighted compared with first X-ray image data and/or the second X-ray image data
The region of degree, (iii) flashing instruction, (iv) optionally includes the profile of the anatomical features of the instruction of cut-off region.
Optionally, the processing unit be configured as by by the part of first X-ray image data and dissection mould
Type and/or probability anatomical atlas are compared to analyze first X-ray image data.
According to second aspect, a kind of x-ray imaging system is provided, comprising:
X-ray source；
X-ray detector；And
According to the display unit of first aspect or its optional embodiment.
The x-ray source is configured in the area-of-interest that X-ray radiation irradiation object is utilized in initial field conditions,
And the X-ray detector is configured as receiving the first radioscopic image of the first part of the area-of-interest of object
Data.
The display unit is configured as showing the boundary error instruction of first X-ray image data to user.
According to the third aspect, a kind of method for identifying boundary error in X-ray image data is provided.The side
Method includes:
A) the first X-ray image data of the first part of the area-of-interest of object is obtained using x-ray imaging device,
Wherein, first X-ray image data be using have be arranged to initial field conditions adjustable viewing field X-ray at
It is obtained as device；
B) first X-ray image data is analyzed to identify boundary error in first X-ray image data；
C) it is defined based on the analysis to first X-ray image data and first X-ray image data
Adjacent boundary error region；
D) boundary error instruction is generated based on the boundary error region；And
E) the boundary error instruction is shown to user；
Wherein, the boundary error instruction is shown to user further include:
E4) boundary error instruction is projected on the second part of the area-of-interest.
Optionally, the boundary error instruction is shown to user further include:
E1 the boundary error instruction) is shown in the user-interface display of x-ray imaging system.
According to example, a kind of method for identifying boundary error in X-ray image data is provided, comprising:
A) the first X-ray image data of the first part of the area-of-interest of object is obtained using x-ray imaging device,
Wherein, first X-ray image data be using have be arranged to initial field conditions adjustable viewing field X-ray at
It is obtained as device；
B) first X-ray image data is analyzed to identify boundary error in first X-ray image data；
C) it is defined based on the analysis to first X-ray image data and first X-ray image data
Adjacent boundary error region；
D) boundary error instruction is generated based on the boundary error region；And
E) the boundary error instruction is shown to user.
According to fourth aspect, provide based on a kind of processing unit and/or system by controlling as described in relation to the first aspect
Calculation machine program unit, the computer program element are adapted for carrying out the third aspect when by the processor and/or system operation
Method.
According to the 5th aspect, a kind of computer-readable Jie of computer program element for being stored with fourth aspect is provided
Matter.
In the following description, term " X-ray image data " refers to the data structure comprising pixel array, wherein every
A pixel indicates the intensity of the X-ray received at specific pixel after the area-of-interest that the X-ray passes through patient.When
When being assembled into two dimensional image, intensity value provides the adduction image for indicating the integral of X-ray absorption of each pixel position.
In the following description, term " x-ray source " refers to the x-ray source including, for example, rotating anode X-ray tube.The X
Region of interest emission X-ray radiation of the radiographic source towards patient to be imaged.X-ray radiation passes through at area-of-interest
It patient and is received by X-ray detector, X-ray detector is also considered the part of x-ray imaging system.X-ray
Imager may include the visual field parameter that can be arranged automatically, for example, adjustable collimator apparatus, adjustable translation or inclination
Servomotor, adjustable height or the setting of xy coordinate.In addition, X-ray detector can be translated vertically or horizontally.
In the following description, the sense that term " visual field " refers to that x-ray imaging device can capture during typical exposure is emerging
The part in interesting region.Visual field is usually by x-ray imaging device at a distance from X-ray detector and/or patient and X-ray detector
Pore size define.By x-ray imaging device mobile in xz plane, visual field can be translated on the region of interest.?
Visual field can be changed by translation or inclined X-rays imager.One or more collimators of adjusting x-ray source can be passed through
Photochopper cuts or amplifies visual field.It will thus be appreciated that adjusting the visual field of x-ray imaging device there are many modes.
In the following description, term " anatomical model ", which refers to, stores and is transported usually on the processing unit of such as computer
Capable data structure.Anatomical model includes the information for defining the location and shape of common anatomical features of patient.Typical dissection
Model defines the part of general patient body.Anatomical model is including, for example, lung, rib cage, the isostructural expression of backbone and specific solution
Cut open a possibility that element is present in specific position.Anatomical model can be designed as allowing from the imperfect part of the image of organ
Identify dissection element.
Term " boundary error region " defines the anatomic region in X-ray image data.It should be appreciated that failing just in visual field
Really in the case where collimation, boundary error region will appear to seem cropped.For example, the leftmost portion of the lobe of the lung or ultra-Right side
Part may lose from X-ray image data.However, translating or being obliquely installed and fail that view is correctly arranged due to undesirable
In the case where, boundary error region may usually be limited by anatomical element that is existing but being for example twisted into " arcuate in shape "
It is fixed.In other words, the boundary error region of X-ray image data is defined to the non-loyal or non-accurate of the anatomical structure of patient
The area of the image of reproduction.
Term " boundary error instruction " definition to make it possible to have been carried out the first X-ray exposure after on patient
The instruction of the position in boundary error region is alerted to medical professional.A kind of mode for realizing this purpose is shown by change
The attribute for the X-ray image data shown highlights the presence of boundary error.For example, boundary error area can be surrounded with rectangle
Domain, or with different color dyes in user interface screen.Alternatively, boundary error region can be projected directly into trouble
On the area-of-interest of person.
Therefore, the basic thought of this specification is quickly directly protruded after the exposure of the first X-ray has been carried out
Display fails the position in problematic region caused by being correctly arranged because of visual field.This is first to the user of x-ray imaging device
It emphasizes that there are visual field mistakes, secondly can be provided to the user of x-ray imaging device and feed back the visual field energy so that x-ray imaging device
It is enough quickly to be reset.
Although the application discusses the concept about lung imaging based on rear-front view, but it is to be understood that described herein
Technology initial X-ray image with lose boundary element when radiophotography in have wide applicability.
Detailed description of the invention
Exemplary embodiment will be described with reference to the following drawings:
Fig. 1 a) stage that initial visual field is configured during X-ray exposure is illustrated to Fig. 1 c).
Fig. 2 illustrates x-ray system.
Fig. 3 illustrates the display unit according to first aspect.
Fig. 4 illustrates X-ray alignment procedure.
Fig. 5 illustrates the schematic diagram of the display unit using optical filter.
Fig. 6 illustrates the method according to the third aspect.
Specific embodiment
Chest radiography is the clinical imaging inspection most often carried out, and is permitted in detection and diagnosis thorax anatomies
It plays an important role in more diseases.The picture quality of the X-ray image data of acquisition depends on many factors, for example, in visual field
(FOV) include to appropriate anatomical structure in, in FOV the contrast of structures of interest and patient chest relative to X-ray at
As the positioning of instrument.
It is usually executed by radiophotography technician in digital X-Ray systems for the task of exposure setting visual field (FOV).
Patient is initially positioned in the area-of-interest before X-ray detector.Then, it is irradiated out of x-ray apparatus tube head
And it is used to visual field projecting to patient body with the matched visible light in the field of X-ray radiation pattern.It can change pipe first
Then the height of head can change the height of " filter line device " comprising detector, and finally can for example collimation device be open
It is adjusted.
Fig. 1 show with clinical radiation photograph in one in the most common projection geometries (that is, chest is rear-preceding
View) check patient.In Fig. 1, x-ray source is located such that X-ray beam is entered by chest rear portion and reaches X-ray
Chest front is left before detector.
Fig. 1 a) show the height 10 that operator adjusts x-ray source.Fig. 1 b) show operator adjust comprising X-ray visit
Survey the height 12 of " the filter line device " of device.Fig. 1 c) show the visible light collimation pattern for indicating the visual field under some collimating status
14 projection.Collimation pattern corresponds to X-ray exposure pattern when X-ray exposure is carrying out.In general, using x-ray source control
Control 16a, 16b on the object of instrument 18 processed collimate pattern 14 to refine.System can be expanded or shunk by changing collimation pattern
Visual field.
In clinical routine, determine that many aspects of picture quality are somewhat dependent upon the skill of system operator
Energy.Make it possible to dive to ensure predefined minimum quality standard although Standard Operating Procedure can be established by medical facility
It is minimized in the usual source of mistake, but the chance itself for causing visual field mistake still has.
The visual field that x-ray apparatus is arranged is the pith of operator's task, but the task, which is also one, is easy error
Task.Common situation is " cut-off ".This refers to the mistake in visual field setting, wherein anticipates the part of anatomical structure of interest
Other places is not included in radioscopic image.Cut-off is one of most common mistake, and is penetrated it is generally necessary to re-shoot whole picture X
Line image.
In general, needing to abandon cut-off exposure to obtain complete rear-preceding lung images.It is all necessary in each case
Carry out completely new exposure.Compared with the case where correctly shooting image in primary shooting, this can waste the time of X-ray facility simultaneously
It will lead to the dosage of at least twice of dosage needed for patient receives.Therefore, it is necessary to one kind for reducing in response to visual field mistake
The method of this extra dose.
Fig. 2 shows x-ray imaging systems 18.The x-ray imaging system includes control device 20, probe assembly 22, with
And x-ray imaging source component 24.Patient generally stands at the area-of-interest 26 between X-ray source component 24 and probe assembly 22
In.
Fig. 2 illustrates the patient in rear-front position.X-ray imaging source component 24 includes the platform being installed on roof
Vehicle 28, trolley 28 are configured as being suspended on the ceiling track 30 of x-ray imaging external member.
X-ray imaging source component 24 is usually supported on smallpox panel guide 30, enable x-ray source towards or away from
Patient (YS) is moved in translation.X-ray imaging source is suspended on track by supporting member 32, and supporting member 32 can be upper
It moves, and can also be rotated around the axis (β S) of supporting member on lower direction (toward and away from floor, ZS axis).
X-ray imaging source component 34 is suspended on supporting member 32 and including shell, which includes to be configured as court
Emit the x-ray source 36 of X-ray radiation to area-of-interest 26 and is configured as emitting visible light towards area-of-interest 26
Visible light source 38.
X-ray source 36 is, for example, rotating anode X-ray tube.Visible light source 38 is each usually provided incandescent lamp or LED light.It is quasi-
Straight element C is between area-of-interest 26 and x-ray source 36 and visible light source 48.
Collimating element C is configured as carrying out shaping to the outer edge of X-ray beam.Simple collimator includes photochopper, should
Photochopper is arranged to the hole of gradual covering x-ray imaging device.More complicated collimating element includes being closed each other with orthogonal plane
It is two photochoppers of arrangement, makes it possible to change the size of visual field.More complicated collimator apparatus includes three faces, four sides or " rainbow
Film " collimator shade device.
Therefore, collimating element C promotes the external model of the visual field to both X-ray radiation pattern and visible optical radiation pattern
It encloses and is defined.It is also noted that x-ray imaging source can be with the angle of tilt alpha S.Entire x-ray imaging device can also be horizontal
XS dimension as shown in the figure is translated across to (on the direction for entering or leaving the page in Fig. 3).
Therefore, in the x-ray imaging system illustrated in Fig. 3, can by manipulation one or more collimator element C come
Adjust the visual field of area-of-interest.Alternatively or additionally, can by the side YS boost or retract x-ray imaging head come
Change the size of visual field.Visual field can be translated by adjusting ZS dimension and XS dimension.Finally, can be by translating or tilting X
Ray imaging device (BS, AS) carries out shaping again to visual field.
It is selected to include above-mentioned collimator and the field conditions that position is arranged by operator, while being shone using visible light source 48
Penetrate patient.Once provided with the satisfactory coverage of area-of-interest, it is activated by x-ray source, and detector element 40
Receive the X-ray information about area-of-interest 36.These information are transferred to control device 20 via data link 42.Operation
Person can watch exposed radioscopic image on such as output equipment of monitor 44.
Therefore, it has been described that conventional x-ray imaging system 18.It should be appreciated that can be by using automatic servo electricity
The position of such as collimator or x-ray imaging source is arranged to control visual field in motivation.
One encountered in the system illustrated in being similar to Fig. 3 especially challenge is the communication of management with patient.Due to behaviour
Author's console 44 is generally placed in the room different from patient, therefore there may be punchings to the attention force request of operator
It is prominent.In general, operator must the movement that improves image of the shift position should make to particular notification patient.
Generally, this application alleviates the problem of linking up with patient.First, it is proposed that on system control position (user interface)
X-ray information is annotated, to use colored RFT figure at the periphery by boundary error of shown X-ray image data
Show boundary error.This provides the existing simple, intuitive about the FOV mistake in X-ray data and quickly feeds back.
The light guide for also proposing enhancing X-ray scanning device, so that the FOV mistake detected can be projected to the sense of patient
On interest region.Therefore, operator can observe FOV mistake and be corrected to it, without patient individually to be stayed in imaging
In room.
According in a first aspect, providing a kind of display unit 50 for x-ray system.Display unit 50 includes:
Data communication interface 52；
Processing unit 54；And
Display output unit 56.
Data communication interface 52 is configured with x-ray imaging device to obtain the first part of the area-of-interest of object
The first X-ray image data, wherein the first X-ray image data be using have be arranged to initial field conditions can
The x-ray imaging device of visual field is adjusted to obtain.
Processing unit 54 is configured as: the first X-ray image data of analysis is to execute in the first X-ray image data
Identify boundary error；Based on the boundary defined to the analysis of the first X-ray image data with the adjoining of the first X-ray image data
Zone errors；And boundary error instruction is generated based on defined boundary error region.
Display output unit 56 is configured as showing boundary error instruction to user.
Therefore, can directly illustrate to the user 58 of x-ray imaging device needs other X to penetrate since picture quality is insufficient
The fact of line exposure.Can on (such as system control position) user interface or on the area-of-interest of patient or
Holiday is clearly illustrated to user in the two.This helps to reset visual field.
In general, data communication interface 52 includes LAN or WAN network connection or specific medical supply communication standard interface
(for example, PACS).Data communication interface 52 makes it possible to obtain the first X from the detector element 40 of such as X-ray acquisition system
Radiographic image data.
Processing unit 54 can execute various pretreatment operations optionally to carry out format to the first X-ray image data
Change.When being formatted as image, the first X-ray image data includes anatomic information, for example, thoracic cavity boundary, lung boundary etc..Place
Reason unit is configured as the first X-ray image data of analysis to identify boundary error in the first X-ray image data.Boundary is wrong
It is accidentally the result for for the first X-ray image acquisition failing that initial field conditions are correctly arranged.For example, x-ray imaging source 34 can
Angle can inadequately be formed or improperly collimated.Boundary error shows as non-in the first X-ray image data
Anatomical features.For example, the cut-off view at the edge of the pulmonary feature in the first X-ray image data is in the first radioscopic image number
To there is the smoothed profile edge that will be interrupted suddenly in the edge of visual field according to middle.
Such anatomical features can optionally be detected by following operation: the use example in the first radioscopic image
Such as edge detection and then by Based on Interpolating Spline applied to the edge detected, or along the edge detection space detected
Change rate.Along edge detection to change rate be greater than preset threshold instruction there are non-anatomical features.
Optionally, though feature in the first X-ray image data due in initial field conditions (such as because of X-ray
Caused by the inappropriate collimation in source) mistake and it is imperfect, the spy detected in the visual field of the first radioscopic image can also be matched
Sign.
When being provided vicious image, this method ensures to the reliable and robust of the visual field of the first radioscopic image
Estimation.Anatomical atlas method allows to identify selected anatomical structure (such as detection lung field boundary) or part thereof, even if in the first X
There is no be also such when some elements for the anatomical structure searched in radiographic image data.
Optionally, the first radioscopic image and anatomical model (for example, probability map) are compared and make it possible to identify just
The defects of beginning field conditions, and the suggestion visual field improved optionally for definition.Probability map can be optionally used as pair
The reference frame that complete field of view is encoded.It then can will likely spy in the first X-ray image data of partial loss
Sign is matched with the element in probability map.When being provided " cut-off " image, this method ensures to the reliable of image f iotaeld-of-view
And the estimation of robust, and make it possible to initial field conditions and the update field conditions for for example being used to reset collimator
It is compared.
Optionally, make it possible to acquire the second X-ray information using the second Image Acquisition that the field conditions of update carry out,
The second X-ray information part includes or completely includes the anatomical data lost from the first X-ray image data.
Therefore, the side of the first radioscopic image can be exported compared with anatomical model based on the first X-ray image data
Boundary error region at edge.Boundary error region indicates the part or the part that lack useful anatomic information in such as image
Side.For example, boundary error region can be defined on the position that the lobe of the lung is truncated in the first image data.
In this example, boundary error region is provided by processor, boundary error region fitting is centered around the first X-ray
Fail the rectangle " bounding box " in the matched anatomical model of robust or the area in probability map in image data.The coordinate of the bounding box
It can be transposed in the coordinate of visual field.Then the visual field parameter of update can be generated optionally according to the coordinate of bounding box simultaneously
The parameter is used to change in the exposure of the second X-ray the collimator setting of x-ray source.
It, can be right by display output unit 56 after detecting boundary error region in the first X-ray image data
Boundary error region is visualized.
In use, patient is introduced into similar to the x-ray imaging system illustrated in Fig. 2, but in addition the system is equipped
There is display unit 50.The exposure of the first radioscopic image is carried out under the setting of initial visual field and sends it to display unit 50.So
Afterwards, display unit 50 analyzes the first X-ray image data to identify because the incorrect visual field setting in x-ray imaging system causes
Boundary error and determine boundary error region.Then, display unit is by showing in boundary error region in x-ray imaging system
On the user interface (system control position) of system or by will be on boundary error region projection to the part of patient's area-of-interest
Or boundary error region is shown by executing the two.This enables the operator of x-ray imaging system to take correction
It acts and ensures that patient is without departing from x-ray imaging in the case where obtaining the radioscopic image with the setting of incorrect visual field
System.
Optionally, display output unit further include:
User interface display unit.The user interface display unit is additionally configured to show on user interface display unit
Show that boundary error indicates.
Therefore, boundary error region can be clearly illustrated to user on the screen of such as digital X-ray machine.
Optionally, processing unit be additionally configured to by boundary error indicate with the first X-ray image data be combined with
The first X-ray image data with annotation is formed, and display output unit is additionally configured to by showing list in user interface
Show that the first X-ray image data with annotation to show boundary error instruction to user in member.
Optionally, processing unit 54 is additionally configured to the seat according to the first X-ray image data and boundary error region
Mark is to generate output display image data, which can be displayed on user interface display unit, example
Such as, LCD or OLED screen curtain.Boundary error region is optionally for example shown as the translucent of the first X-ray image data
It is superimposed object.Alternatively, boundary error region be optionally for example shown as filled marks object in the first X-ray image data or
Cursor.Optionally, boundary error region can be shown as to the instruction of the alphanumeric of the following contents: must be by collimator to figure
The adjustable range (such as by centimetre as unit of) to include complete anatomical structure is adjusted on the right side of left side or image.
In the substitution or additional embodiment of display output unit 56, the sense that boundary error region is projected to patient is emerging
On interesting region, while patient still stands in the visual field of x-ray imaging system.It is desirable that patient will keep in imaging process
In same position.For example, can use LCD projector or execute projection by colour filter shade device.
It is optionally possible to 1D coloring line be projected on the area-of-interest of the patient of the boundary in visual field.It uses
First color (for example, green) indicates to exist to indicate that there is no boundary errors using the second color (for example, red)
Boundary error.
Fig. 4 shows the patient 64 to stand in the area-of-interest of X-ray scanning system.It is arranged by collimating controller 60
Collimation pattern 62 is projected to the back of patient 64.After acquiring the first X-ray image data 66, processing unit detect as
The presence of boundary error shown in image 68.Particularly, boundary error region 70 can be defined.
In the first output configuration shown in image 76, three lines with the first color (for example, green) are projected
Onto the area-of-interest (back of patient) inconsistent with boundary error on the edge of visual field.With the second color (example
Such as, red) a line 74 be projected to on the consistent region of boundary error.
In the second output configuration shown in image 80, when using initial field conditions, only a line 78 is projected
To on the consistent area-of-interest of boundary error.
In third output configuration, solution extracted from the first X-ray image data and with the matched patient of anatomical atlas
The trace for cuing open structure 82 is projected on the area-of-interest of patient.In conjunction with the first configuration or the second configuration, or individually, energy
It enough can be clearly seen that anatomical structure has been subjected to the influence of visual field setting mistake.It should be appreciated that the trace of the anatomical structure of patient
Projection be preferably performed using the digital projector of such as LCD projector, but the projection of line 72,74,78 can be
Come using " simulation " unit of the digital projection unit of such as LCD projector or the removable colour filter such as before light source
It realizes.
Optionally, processing unit 54 be configured as the first X-ray image data and boundary error region being combined with
Form the X-ray information with annotation.X-ray information with annotation can be transmitted to data retrieval system by processing unit 54.Cause
This, for example, the X-ray information with annotation can be incorporated into report-generating method to provide pass in the medical files of patient
In the information of boundary error.
Optionally, display unit further include:
Projecting cell.
Display output unit is also configured to use the region of interest that boundary error instruction is projected to object by projecting cell
On the second part in domain.
Therefore, boundary error region can be projected directly into the interested of patient in such a way that system user is difficult to ignore
On region.It reduce users in the possibility for taking corrective action (such as shooting new radioscopic image) to leave X-ray room before
Property.
Optionally, processing unit is also configured to calculate the field conditions updated, and passes through (i) for the visual field of update
It indicates on the Part III for the area-of-interest for projecting to object and/or (ii) shows update on user interface display unit
The visual field instruction that visual field indicates to show update.
Optionally, projecting cell includes digital projection unit.Boundary error instruction is projected using digital projection unit
Onto the second part of the area-of-interest of object.
Optionally, processing unit is configurable to generate the contours mask data of the first radioscopic image.Optionally, this is logical
It crosses and carries out edge detection and segmentation to the first X-ray image data to realize.Contours mask data are using digital projection list
Member is projected on area-of-interest.Optionally, contours mask data include boundary error instruction.
Therefore, digital projection unit can be provided with many of different shapes, optionally the anatomical structure of reference patient
Boundary error region instruction.
Optionally, projecting cell further include:
Component of the light filter is operatively coupled to processing unit and can be configured as at least partly in light source
It is directed toward on the periphery of the optical path of area-of-interest and extends.
Processing unit is also configured to based on boundary error instruction actuating component of the light filter at least partly in place in X
Extend on the periphery of the optical path of light source inside radiographic source, and sends the irradiation letter for the light source inside X-ray irradiation source
Number.
Therefore, the existing illumination mechanism of many X-ray production apparatus may be adapted to highlight the periphery mistake in visual field setting.
Fig. 5 illustrates the x-ray source for being arranged to generate display label.The shell 84 of x-ray source includes light source 86, hole 90
With optional reflector 88 so that x-ray source shell be used as " lamp box ".For the sake of simplicity, Fig. 5 is not shown x-ray source, but lamp
Case also includes rotating anode X-ray tube, such as is arranged to emit X-ray radiation towards hole 90.The hole of lamp box is by multiple high
Density (for example, molybdenum) movable light shielding device 92a and 92b is limited, and photochopper 92a and 92b can be by actuating unit (not shown)
It is configured to be collimated to the X-ray beam or visible light beam that leave x-ray source.Visible light filter unit 94a and 94b (example
Such as, filter glass or optical filtering gel rubber material) it is arranged to be activated respectively, it extends in light beam 96.Actuating is based on from by handling
Signal derived from the boundary error area information that unit calculates.Therefore, the region of the natural color with light source 86 will be projected
On area-of-interest at the 98a of part, and the region of the color with visible light filter unit will be projected to part 98b
On the area-of-interest at place.
Optionally, boundary error instruction and/or the visual field instruction updated are using one or more of the following items quilt
Be shown on the part of the area-of-interest of user interface and/or object: the rectangle instruction of (i) coloring, (ii) is penetrated with the first X
Line image data and/or the second X-ray image data, which are compared, has lower or more high brightness region, (iii) flashing instruction,
(iv) profile of the anatomical features of the instruction of cut-off region is optionally included.
Optionally, processing unit is configured as by by the part of the first X-ray image data and anatomical model and/or general
Rate anatomical atlas is compared to the first X-ray image data of analysis.
According to second aspect, a kind of x-ray imaging system is provided, comprising:
X-ray source；
X-ray detector；And
According to the display unit of first aspect or its optional embodiment.
X-ray source is configured in the area-of-interest that X-ray radiation irradiation object is utilized in initial field conditions, and
X-ray detector is configured as receiving the first X-ray image data of the first part of the area-of-interest of object.
Display unit is configured as showing the boundary error instruction of the first X-ray image data to user.
According to the third aspect, a kind of method for identifying boundary error in X-ray image data is provided.This method
Include:
A) the first radioscopic image number of the first part of the area-of-interest of 100 objects is obtained using x-ray imaging device
According to, wherein the first X-ray image data be using have the X-ray for the adjustable viewing field for being arranged to initial field conditions at
It is obtained as device；
B) 102 first X-ray image datas are analyzed to identify boundary error in the first X-ray image data；
C) based on to the first X-ray image data analysis come define 104 with first X-ray image data abut boundary
Zone errors；
D) 106 boundary errors instruction is generated based on boundary error region；And
E) show that 108 boundary errors indicate to user.
Optionally, boundary error instruction is shown to user further include:
E1) show that boundary error indicates in the user-interface display of x-ray imaging system.
Optionally, this method further include:
E2) boundary error instruction and the first X-ray image data are combined to form the first X ray picture with annotation
As data, and
E3) wherein, boundary error instruction is shown to user further include: show in user-interface display with the annotated
One X-ray image data.
Optionally, boundary error instruction is shown to user further include:
E4) on the second part for the area-of-interest that boundary error instruction is projected to object.
Optionally, on the second part for the area-of-interest for boundary error instruction being projected to object further include:
E5 it) is indicated based on boundary error, indicates to be configured to extend to positioned at X-ray by component of the light filter based on boundary error
The optical path of light source inside source；And
E6) the light source inside X-ray irradiation source.
Optionally, boundary error instruction is second of area-of-interest that object is projected to using digital projection unit
On point.
Optionally, this method further include:
F) field conditions updated are calculated；And
G) the visual field instruction that display updates；
Wherein, it on the Part III for the area-of-interest that the visual field instruction of update is projected to object, and/or is shown
Show in the user-interface display of x-ray imaging system.
Optionally, this method further include:
H) order for acquiring the second radioscopic image is received from user；
I) visual field of x-ray imaging device is adjusted to the field conditions to update；And
J) the second X-ray image data is acquired with the field conditions after adjusting.
Optionally, this method further include:
Wherein, in step b), the analysis to the first X-ray image data includes by the first X-ray image data and solution
Model is cutd open to be compared.
According to fourth aspect, provide a kind of for controlling the calculating of the display unit according to first aspect or embodiment
Machine program unit, the method that computer program element is adapted for carrying out the third aspect when being run by processing unit.
According to the fifth aspect of the invention, a kind of computer of computer program element for being stored with fourth aspect is provided
Readable medium.
Therefore, computer program element can be stored in computer unit, which is also possible to
The part of the embodiment of the present invention.The computing unit may be adapted to the execution for the step of executing or causing to the above method.
In addition, the computing unit may be adapted to the component for operating above-mentioned apparatus.The computing unit can be adapted to be automatically brought into operation
And/or the order of operation user.Computer program can be loaded into the working storage of data processor.It therefore, can be with
Data processor is equipped to execute method of the invention.
Exemplary embodiment of the present invention covers is mounted with computer program of the invention from the beginning, and by means of
The update of existing program is converted to and uses both computer programs of program of the invention.Computer program can by storage and/
Or be distributed on suitable medium, for example, the optical storage that the part together with other hardware or as other hardware is supplied
Medium or solid state medium, but can also be distributed otherwise, for example, via internet or other wired or wireless telecommunications
System distribution.
However, the program can also exist on network (such as WWW), and can be downloaded to from such network
In the working storage of data processor.Other exemplary embodiments according to the present invention are provided for making computer journey
Sequence unit can be used for the medium downloaded, and the computer program element is arranged to execute previously described reality according to the present invention
The method for applying one embodiment in example.
It should be noted that the embodiment of the present invention is described with reference to different themes.In particular, some embodiments are references
Method type claim describes, and other embodiments are reference unit type claims to describe.However, unless otherwise
Illustrate, those skilled in the art will be inferred to from the description of above and below, except the feature for belonging to a type of theme
Except any combination, be related to any combination between the feature of different themes be recognized as obtain in this application disclosure.
All features can be combined to provide the synergistic effect of the simple adduction more than feature.
It is such to illustrate and retouch although illustrating and describing the present invention in detail in the drawings and the preceding description
Stating should be considered as n-lustrative or illustrative, and not restrictive.The present invention is not limited to the disclosed embodiments.
Those skilled in the art are practicing claimed invention by research attached drawing, disclosure and claim
When can understand and realize other variants of the disclosed embodiments.
In the claims, one word of " comprising " is not excluded for other elements or step, and word "a" or "an" is not arranged
Except multiple.The function of several recorded in the claims may be implemented in single processor or other units.Although certain arrange
It applies and is described in mutually different dependent claims, but this does not indicate that the group that these measures cannot be used to advantage
It closes.Any appended drawing reference in claim is all not necessarily to be construed as the limitation to range.
Claims (13)
1. a kind of display unit (50) for x-ray system, comprising:
Data communication interface (52)；
Processing unit (54)；And
Display output unit (56) comprising projecting cell；
Wherein, the data communication interface is configured with x-ray imaging device to obtain the first of the area-of-interest of object
The first partial X-ray image data, wherein first X-ray image data be using have be arranged to initial visual field
The x-ray imaging device of the adjustable viewing field of state obtains；
Wherein, the processing unit is configured as: analysis first X-ray image data is in first radioscopic image
Boundary error is identified in data；It is defined based on the analysis to first X-ray image data and first X-ray
The adjacent boundary error region of image data；And boundary error instruction is generated based on defined boundary error region；And
And
Wherein, the display output unit is configured as projecting to boundary error instruction by using the projecting cell
Come to show the boundary error instruction to user on the second part of the area-of-interest of the object.
2. display unit (50) according to claim 1,
Wherein, the display output unit (56) further include:
User interface display unit；And
Wherein, the user interface display unit is additionally configured to show that the boundary is wrong on the user interface display unit
Accidentally indicate.
3. display unit (50) according to claim 2,
Wherein, the processing unit is additionally configured to indicate to carry out with first X-ray image data by the boundary error
It combines to form the first X-ray image data with annotation, and
Wherein, the display output unit (56) is additionally configured to by showing the band on the user interface display unit
First X-ray image data of annotation to show the boundary error instruction to user.
4. display unit (50) according to any one of the preceding claims,
Wherein, the processing unit (54) is also configured to calculate the field conditions updated, and passes through (i) for the view of update
On the Part III for the area-of-interest that field instruction projects to the object and/or (ii) is single in user interface display
The visual field instruction of update is shown in member to show the visual field instruction of the update.
5. display unit (50) according to any one of claims 1 to 4,
Wherein, the projecting cell includes digital projection unit；And wherein, the boundary error instruction is using digital projection
Unit is projected on the second part of the area-of-interest of the object.
6. display unit (50) according to any one of claims 1 to 5,
Wherein, the projecting cell further include:
Component of the light filter (94a, 94b) is operatively coupled to the processing unit (54) and can be configured as at least
It is partly directed toward on the periphery of the optical path of the area-of-interest and extends in light source,
Wherein, the processing unit (54) is also configured to configure the component of the light filter based on boundary error instruction
At least partly to extend on the periphery of the optical path for the light source being located inside x-ray source, and send for irradiating
State the project signal of the light source inside x-ray source.
7. display unit (50) according to any one of the preceding claims,
Wherein, the visual field instruction of the boundary error instruction and/or the update is using one or more of the following items
Be displayed on the part of the area-of-interest of the user interface and/or the object: the rectangle of (i) coloring refers to
Show, (ii) has lower or more high brightness compared with first X-ray image data and/or the second X-ray image data
Region, (iii) flashing instruction, (iv) optionally includes the profile of the anatomical features of the instruction of cut-off region.
8. display unit according to any one of the preceding claims,
Wherein, the processing unit (54) is configured as by by the part of first X-ray image data and anatomical model
And/or probability anatomical atlas is compared to analyze first X-ray image data.
9. a kind of x-ray imaging system, comprising:
X-ray source；
X-ray detector；And
According to claim 1 to display unit described in any one of 8 (50)；
Wherein, the x-ray source is configured in initial field conditions to utilize the region of interest of X-ray radiation irradiation object
Domain；And
Wherein, the X-ray detector is configured as receiving the first X-ray of the first part of the area-of-interest of object
Image data；And
Wherein, the display unit is configured as projecting to boundary error instruction by using the projecting cell described
Show that the boundary error of first X-ray image data refers to user on the second part of the area-of-interest of object
Show.
10. a kind of method for identifying boundary error in X-ray image data, comprising:
A) the first radioscopic image number of the first part of the area-of-interest of (100) object is obtained using x-ray imaging device
According to, wherein first X-ray image data is penetrated using the X with the adjustable viewing field for being arranged to initial field conditions
Line imaging device obtains；
B) (102) described first X-ray image data is analyzed to identify boundary error in first X-ray image data；
C) (104) and first X-ray image data are defined based on the analysis to first X-ray image data
Adjacent boundary error region；
D) (106) boundary error instruction is generated based on the boundary error region；And
E) (108) described boundary error instruction is shown to user；
Wherein, the boundary error instruction is shown to user further include:
E4) boundary error instruction is projected on the second part of the area-of-interest of the object.
11. according to the method described in claim 10,
Wherein, the boundary error instruction is shown to user further include:
E1 the boundary error instruction) is shown in the user-interface display of x-ray imaging system.
12. a kind of for controlling according to claim 1 to the computer of processing unit and/or system described in any one of 8
Program unit, the computer program element are adapted for carrying out when by the processor and/or system operation according to claim
Method described in 10 or 11.
13. a kind of computer-readable medium for being stored with computer program element according to claim 12.
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| EP16204212 | 2016-12-15 | ||
| PCT/EP2017/082928 WO2018109127A1 (en) | 2016-12-15 | 2017-12-14 | Visualizing collimation errors |
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| JP (1) | JP7080237B6 (en) |
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| US20210378623A1 (en) * | 2018-10-22 | 2021-12-09 | Haim Melman | Control System For X-Ray Imaging System |
| FI128796B (en) * | 2019-06-03 | 2020-12-15 | Planmeca Oy | CT Imaging Apparatus |
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- 2017-12-14 US US16/468,994 patent/US11517277B2/en active Active
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| JP2020501684A (en) | 2020-01-23 |
| US20210401391A1 (en) | 2021-12-30 |
| US11517277B2 (en) | 2022-12-06 |
| JP7080237B6 (en) | 2022-06-23 |
| EP3554375A1 (en) | 2019-10-23 |
| JP7080237B2 (en) | 2022-06-03 |
| WO2018109127A1 (en) | 2018-06-21 |
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